87672292443817 has 2 divisors, whose sum is σ = 87672292443818. Its totient is φ = 87672292443816.

The previous prime is 87672292443779. The next prime is 87672292443881. The reversal of 87672292443817 is 71834429227678.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87589308695056 + 82983748761 = 9358916^2 + 288069^2 .

It is a cyclic number.

It is not a de Polignac number, because 87672292443817 - 2³¹ = 87670144960169 is a prime.

It is not a weakly prime, because it can be changed into another prime (87672292443317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43836146221908 + 43836146221909.

It is an arithmetic number, because the mean of its divisors is an integer number (43836146221909).

Almost surely, 2^{87672292443817} is an apocalyptic number.

It is an amenable number.

87672292443817 is a deficient number, since it is larger than the sum of its proper divisors (1).

87672292443817 is an equidigital number, since it uses as much as digits as its factorization.

87672292443817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 455196672, while the sum is 70.

The spelling of 87672292443817 in words is "eighty-seven trillion, six hundred seventy-two billion, two hundred ninety-two million, four hundred forty-three thousand, eight hundred seventeen".